Global Patent Index - EP 1151325 A4

EP 1151325 A4 20030924 - HIGH RESOLUTION ARRAY INDUCTION TOOL

Title (en)

HIGH RESOLUTION ARRAY INDUCTION TOOL

Title (de)

MEHRFACHANORDNUNG ZUR INDUKTIONSUNTERSUCHUNG MIT HOHER AUFTOSUNG.

Title (fr)

CONCEPTION D'UN OUTIL D'INDUCTION DE FAISCEAU HAUTE RESOLUTION

Publication

EP 1151325 A4 20030924 (EN)

Application

EP 99964234 A 19991214

Priority

  • US 9929511 W 19991214
  • US 11216198 P 19981214

Abstract (en)

[origin: WO0036437A1] A coil array for high resolution logging (Figure 3), comprises a transmitter (T), a first receiver set positioned at a distance from the transmitter (UR), and a second receiver set positioned at a second distance from the transmitter (LR), and a method for deriving a conductivity log from at least one induction well log that comprises a plurality of depth samples (Figure 4), comprising the steps of raising each depth sample of the conductivity signal to several predetermined powers to generate a plurality of powers of conductivity, convolving in depth the powers of conductivity with a plurality of filters, and summing the results of all the convolutions to produce a conductivity log that is free from the effects of adjacent beds and the nonlinear effects of true conductivity. The apparatus for measuring the resistivity, (figure 2), of an earth formation penetrated by a borehole, comprising at least one transmitter energized by a time varying periodic voltage, one set of receivers generating a receiver voltage, with an analog to digital converter that periodically samples the receiver voltage at a predetermined sampling rate and outputs a digitized voltage signal, (Figure 2), and a computer processor that receives the digitized voltage signal, with a set of N accumulators that collates and averages successive sets of N samples from the A-D converters and outputs a set of N averages.

IPC 1-7

G01V 3/28

IPC 8 full level

G01V 3/28 (2006.01)

CPC (source: EP US)

G01V 3/28 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

FR GB

DOCDB simple family (publication)

WO 0036437 A1 20000622; CA 2355083 A1 20000622; CA 2355083 C 20050111; EP 1151325 A1 20011107; EP 1151325 A4 20030924; NO 20012924 D0 20010613; NO 20012924 L 20010813; US 2003100994 A1 20030529; US 2003107378 A1 20030612; US 6597993 B2 20030722; US 6600995 B2 20030729; US 6606565 B1 20030812

DOCDB simple family (application)

US 9929511 W 19991214; CA 2355083 A 19991214; EP 99964234 A 19991214; NO 20012924 A 20010613; US 28808602 A 20021105; US 28810602 A 20021105; US 46055399 A 19991214